Re: Logical Drive not on preferred path

‏2013-08-20T19:42:11Z

This is the accepted answer.
This is the accepted answer.

This error Means that there is an error on the multipathing. This can happen if the Storage system is cabled wrong. You dont give any detail whenever you connect with SAS, iSCSI or FC, so its hard to give concrete help with that, except read the redbook on how to attached the hosts to the DS3512, or reply with your setup.

What happens is that a LUN is owned by a preferred controller, and when it fails over to the other controller, you get the error. Often the LUN will failover between the controllers only when there is a hardware error on a switch or one of the controllers.

I've seen it happen because people cable the system wrong. (for example, cable one controller to one switch, and the other to another switch. All HBA's on all servers using the SAN needs to be able to connect to both controllers. (Except when using Direct SAS connectivity though)

You also need to make sure your host type is chosen correctly for each and every host object. If you use vSphere 5.0U1 or later, you should use VMWareALUA, if 5.0RTM and below, use VMWare as hosttype.

Re: Logical Drive not on preferred path

This error Means that there is an error on the multipathing. This can happen if the Storage system is cabled wrong. You dont give any detail whenever you connect with SAS, iSCSI or FC, so its hard to give concrete help with that, except read the redbook on how to attached the hosts to the DS3512, or reply with your setup.

What happens is that a LUN is owned by a preferred controller, and when it fails over to the other controller, you get the error. Often the LUN will failover between the controllers only when there is a hardware error on a switch or one of the controllers.

I've seen it happen because people cable the system wrong. (for example, cable one controller to one switch, and the other to another switch. All HBA's on all servers using the SAN needs to be able to connect to both controllers. (Except when using Direct SAS connectivity though)

You also need to make sure your host type is chosen correctly for each and every host object. If you use vSphere 5.0U1 or later, you should use VMWareALUA, if 5.0RTM and below, use VMWare as hosttype.